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# Ripple And Voltage

218 Threads found on edaboard.com: Ripple And Voltage

## Power supply for an amplifier

Hello Normaly you can use the formula C = Io * At/Av At is 1/T and depends the type of rectifier and frequency Av is the max ripple you want in the power an Io is the output current. Regards

## Push-Pull Center tap forward(buck) converter

Hi... In our project we want Full Bridge Push-Pull transformer. I tried to search online but could not find any proper tutorial for designing the one. Hope you guys will give some hints. I have allready made it and test it. But there are few lacking in that. The output voltage doesnot go above 25V and output having more (...)

## Allowed ripple in Buck converter

Hello everyone, I am designing a constant off time current mode control Buck converter. I am getting Output ripple voltage at 10% of the output voltage. How can I reduce these ripples

## Question about power supplies

There are two formulas that my book gives to calculate maximum current and average current through a diode of a full wave rectifier. I was wondering what are those represented as on a diode's data sheet. the formulas are: i dmax = IL(1 + 3.14×√Vp/2×Vr) i av = IL(1 + 2×3.14 ×√Vp/2×Vr) Vr is the ripple voltage peak to (...)

## How to exlapin constant phase offset when PLL is locked ?

I have a PLL transient simulation. When PLL is very likely locked,i.e.,loop filter voltage has less than 1mV ripple and after >10us settling. But look at the charge pump up/down current pulse I found there is a constant phase error(about the same big as the PFD delay chain's delay time) between the Fref and Fdiv. My (...)

## small-ripple approximation

Hello all A RLC circuit , the source consist of the desired dc component plus a small undersied ac component. If the Inductive Reactance and capacitive Reactance are very large (that is L is very large and C is very small). Can I do the small-ripple approximation on the Inductor current and Capacitor (...)

## switching regulator voltage ripple vs. output voltage level

Output voltage has it's peak, rms or average value. No matter how it is measured the result depends on it's waveform or shape over time. If the voltage is pure DC it's peak, rms or average values are equal. voltage with added ripple has different values for peak, rms and average measurement depending on it's (...)

## Coupling capacitor/bypass capacitor

One of basic properties of bypass capacitor is it's low reactance in respect to frequency of AC signal. The effect of placing such capacitor across supply rails, for example, reduces noise or ripple on supply voltage. Supply voltage source has a finite internal resistance and the AC component of load current causes noise or (...)

## Problem with measuring the vbg output of bandgap

hi, i have a bandgap in a testchip, and when i measure the vbg output using oscilloscope, there is no ripple and it remains a fixed value and doesn't change. However when i use multimeter to measure the voltage, i get different values at different measurement, can anyone tell me what 's (...)

## Boost Converter Output Voltage Ripple Problem

The output ripple seems to be triangular, as expected, but with impulse noise present. This noise should be removed because it will cause trouble everywhere in the circuits that are powered by the boost. This probably comes from the turn-on/turn-off of the transistor, a snubber could be of some use. Good luck, cyberblak

## the right power supply equipment for analog chip

hi all, i'm choosing a POWER SUPPLY equipment for test and measurement on ANALOG CHIP. please give me some advise on the SPEC, thx in advance. 1) what is the MAX "ripple & noise" acceptable for analog chip ? 5mV rms & 3mA rms ? 10mV ptp ? or ? 2) line regulation constant voltage & current ? 0.01% 3mV & 0.2% 2mA ? or ? 3) load (...)

## DC coupling and AC coupling

The best example is the standard oscilloscope input. You can switch it or to DC or AC coupled mode. If you want to see full signal, sey rectified voltage which consists from DC component plus AC ripple, you should switch to DC couplung. If you want to measure the ripple voltage only, then switch to AC (...)

## DC/DC converter question

I assume that you are using smoothing capacitor between the bridge and your boost converter, so your input unregulated voltage will be roughly 1.4 * AC (rms) voltage before the bridge, and that value (-x% ripple) you can use in transistor calculations .. Regards, IanP

## How to measure the rpm of a car motor from the ripple battery?

hello, I want to to measure the rpm car motor from the ripple battery. These ripple is related with the rpm motor. I think to use a hp filter for to amplifier the ripple and cut the continuos signal. I hope that you Know the best solution thanks, and you excuse me for my english level. I'm Spanish

## AC to DC Power Supply Design Project

to meet your requirements all you need is 4 diodes & a really big Capacitor. 5 parts, maybe 2\$ to build. form the diodes into a "full wave rectifier" form and put the capacitor on the output. the capacitor is what will give you the DC output. of course, you will not get a pure DC output, there will be some voltage ripple, but even t

## how to decrease the output voltage ripple?

The most efficient way of decreasing output ripple in switchmode DC-DC converter is to use LC filters. Other option, although not as efficient as LC, is to employ low ESR capacitors and connect several different capacitors to cover wider frequency range. Regards, IanP

## My Programer Doesn't Burn The PIC16F628A + Help

this is a common error which occurs due to the programming voltage being too low. check your power source for ripples. it might have too many ripples and that could be the most likely cause of this problem. i would suggest you to power the programmer from two 9V batteries. that way you wont have any problems with (...)

## PSRR+ and PSRR- question

PSRR stands for Power Supply Rejection Ratio. As you can imagine, an infinite PSRR means that absolutely no change in the power supply voltage will affect the output. Of course, this is an ideal situation, in practice the PSRR has a finite (though large) value, such that power supply variations and ripple will have some (...)

## power supply switching noise help

Put an LC filter on the output of the power supply, this will greatly reduce the output voltage ripple.

## Why does the supply voltage vary in a circuit?

It's pretty hard to mention ALL the reasons, but here are a few: 1. ripple voltage can feed through the power supply, due to its finite ripple rejection 2. A switching power supply will generate ripple at the switching frequency, due to parasitic elements in the output capacitors (ESR, ESL) and due to (...)